ai.naelosPublished by naelos.aiOfficial publisherv1.0.0Updated Oct 29, 2026
Astrology charts, transits and eclipses from NASA JPL data, 13,200 BC to AD 17,191. Free, no key.
Remote astrology server that computes natal charts, transits, synastry, returns, progressions and eclipses from NASA JPL ephemeris data.
Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.
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{
"mcpServers": {
"naelos-ai": {
"type": "http",
"url": "https://mcp.naelos.ai/mcp"
}
}
}Birth chart
A complete natal (birth) chart: every planet's sign, degree and house, the Ascendant and Midheaven, retrogrades, and the aspects between planets with exact orbs. Calculated from NASA JPL data by Naelos Ephemeris.
daterequiredtimeplacelatituderequiredtimezonerequiredlongituderequiredhouse_systemThe sky at a moment
Where every planet is at a moment (now by default): sign, degree, retrograde, and the aspects between them. Give a place to add houses and angles. Works for any date from 13,200 BC to AD 17,191.
latitudelongitudedatetime_utcOne planet at any date
One body's tropical position on a date, anywhere from 13,200 BC to AD 17,191, with its speed and whether it is retrograde. For historical and ancient dates; dates before 1582 are proleptic Gregorian.
bodyrequireddaterequiredtime_utcTransits to a birth chart
Every exact transit of the planets (Sun to Pluto; the Moon is left out as it aspects everything monthly) to a birth chart's planets, Ascendant and Midheaven over a span, with the exact date of each and whether the planet is retrograde. Major aspects: conjunction, sextile, square, trine, opposition.
daterequireddaysfromtimeplacelatituderequiredtimezonerequiredlongituderequiredSynastry between two people
The aspects between two people's birth charts (each one's planets to the other's), with exact orbs and strength.
person_arequiredperson_brequiredSolar or lunar return
The solar return for a year (the moment the Sun returns to its birth position, the chart for that year) or the lunar return nearest now, cast for the birthplace or another location.
daterequiredkindrequiredtimeyearplacelatituderequiredtimezonerequiredlongituderequiredreturn_latitudereturn_longitudeProgressions and solar arc, now
The progressed chart as of today: secondary progressions (a day after birth for each year of life) or solar arc directions (every point moved by the Sun's progressed arc).
daterequiredtimeplacemethodlatituderequiredtimezonerequiredlongituderequiredIngresses, lunations and stations
Between two dates: planets changing sign, new and full Moons (and quarters), and retrograde and direct stations, each with its exact moment in UTC. At most two years per call.
torequiredfromrequiredkindsEclipses
Solar and lunar eclipses between two dates (up to 20 years per call), with type, the exact moment of greatest eclipse and the eclipse degree. Works across the full 15,000-year span.
torequiredfromrequiredNaelos's national and empire charts
Which national charts (198) and empire charts (19) Naelos holds, each researched and sourced, with the founding event it is cast for. The charts themselves, with their times, places and readings, are in Naelos's Mundane suite.
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